Tag: M.W=400-450

Koohmareh, Gholam Ali published the artcileSynthesis, characterization, and optical properties of new pyridine- and thiophene-based copolymer bearing bulky naphthyl group, Synthetic Route of 239075-02-6, the publication is Polymer Bulletin (Heidelberg, Germany) (2015), 72(11), 2979-2990, database is CAplus.

A new copolymer was synthesized via reaction of new pyridine-containing dibromo compound, 2,6-bis(4-bromophenyl)-4-(naphthalen-1-yl) pyridine, with thiophene-based diboronic ester via Suzuki cross-coupling reactions. 2,6-Bis(4-bromophenyl)-4-(naphthalen-1-yl) pyridine was synthesized starting from condensation reactions of 4-bromoacetophenone and 1-naphthaldehyde. The synthesized monomer and polymer were characterized by FT-IR and NMR spectroscopy. The phys. properties of the polymer, including solubility and viscosity were studied, and the results showed good solubility and chain growth for polymer. Maximum absorption peak for polymer was 388 nm. The optical band gap energy of the polymers was determined by absorption onset and 2.38 eV for polymer.

Polymer Bulletin (Heidelberg, Germany) published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, Synthetic Route of 239075-02-6.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Bertrand, Guillaume H. V. published the artcileThiophene-based covalent organic frameworks, Recommanded Product: 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, the publication is Proceedings of the National Academy of Sciences of the United States of America (2013), 110(13), 4923-4928, S4923/1-S4923/20, database is CAplus and MEDLINE.

We report the synthesis and characterization of covalent organic frameworks (COFs) incorporating thiophene-based building blocks. We show that these are amenable to reticular synthesis, and that bent ditopic monomers, such as 2,5-thiophenediboronic acid, are defect-prone building blocks that are susceptible to synthetic variations during COF synthesis. The synthesis and characterization of an unusual charge transfer complex between thieno[3,2-b]thiophene-2,5-diboronic acid and tetracyanoquinodimethane enabled by the unique COF architecture is also presented. Together, these results delineate important synthetic advances toward the implementation of COFs in electronic devices.

Proceedings of the National Academy of Sciences of the United States of America published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, Recommanded Product: 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Daldrup, T. published the artcileA screening test for pharmaceuticals, drugs and insecticides with reversed-phase liquid chromatography – retention data of 560 compounds, Application of N-Benzyl-N,N-dimethyl-2-phenoxyethanaminium 3-hydroxy-2-naphthoate, the publication is Chromatography Newsletter (1982), 10(1), 1-7, database is CAplus.

High-performance reversed-phase liquid chromatog. retention data are given. The relative retention times were calculated as the ratio of retention times of compound and reference compound 5-(p-methylphenyl)-5-phenylhydantoin. The UV detector wavelength was 220 nm, where most of the compounds gave a good response. The sensitivity of the method for each compound is rated from very good to bad. Two solvent programs and a prepacked column C-18 SIL-X-10 were used for the anal.

Chromatography Newsletter published new progress about 3818-50-6. 3818-50-6 belongs to alcohols-buliding-blocks, auxiliary class Anti-infection,Antiparasitic, name is N-Benzyl-N,N-dimethyl-2-phenoxyethanaminium 3-hydroxy-2-naphthoate, and the molecular formula is C28H29NO4, Application of N-Benzyl-N,N-dimethyl-2-phenoxyethanaminium 3-hydroxy-2-naphthoate.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Yuan, Yuping published the artcileEnergy level tuning of polythiophene derivative by click chemistry-type postfunctionalization of side-chain alkynes, Safety of 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2011), 49(1), 225-233, database is CAplus.

A polythiophene derivative substituted with electron-rich alkynes as a side chain was synthesized using the Suzuki polycondensation reaction. The electron-rich alkynes underwent the “click chem.”-type quant. addition reaction with strong acceptor mols., such as tetracyanoethylene (TCNE) and 7,7,8,8-tetracyanoquinodimethane (TCNQ), resulting in the formation of donor-acceptor chromophores. All polymers showed excellent solubilities in the common organic solvents as well as good thermal stabilities with their 5% decomposition temperatures exceeding 230 °C. The TCNE-/TCNQ-adducted polymers displayed well-defined charge-transfer (CT) bands in the low energy region. The CT energy of the TCNE-adducted polymer was 2.56 eV (484 nm), which was much greater than that of the TCNQ-adducted polymer [1.65 eV (750 nm)]. This result was supported by the electrochem. measurements. The electrochem. band gaps of the TCNE-adducted polymers were much greater than those of the corresponding TCNQ-adducted polymers. Furthermore, the HOMO and LUMO energy levels, determined from the first oxidation and first reduction peak potentials, resp., decreased with the increasing acceptor addition amount All these results suggested that the energy levels of the polythiophene derivative can be tuned by varying the species and amount of the acceptor mols. using this postfunctionalization method. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2010.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C12H14S, Safety of 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

McAfee, Seth M. published the artcileUtility of a heterogeneous palladium catalyst for the synthesis of a molecular semiconductor via Stille, Suzuki, and direct heteroarylation cross-coupling reactions, Synthetic Route of 239075-02-6, the publication is RSC Advances (2015), 5(33), 26097-26106, database is CAplus.

The com. available silica-supported heterogeneous catalyst SiliaCat DPP-Pd has proven to be highly active, robust, and reusable for the synthesis of a thiophene-phthalimide-based mol. semiconductor under microwave-irradiation reaction conditions. A Stille reaction protocol demonstrated that SiliaCat DPP-Pd outperformed well-known homogeneous catalysts, Pd(PPh₃)₄ and Pd(PPh₃)₂Cl₂, in terms of performance and catalyst loading, while also exhibiting tolerance to ambient reaction conditions and two-fold recyclability for the formation of product. The success established for SiliaCat DPP-Pd catalyzed Stille reactions via microwave irradiation was extended to optimize Suzuki coupling and direct heteroarylation protocols. Notably, direct heteroarylation with SiliaCat DPP-Pd exhibited excellent selectivity and perturbed the formation of homo-coupled aryl bromides, two side reactions that are known to plague this type of cross-coupling reaction.

RSC Advances published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, Synthetic Route of 239075-02-6.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Abiko, Yohei published the artcileThermoresponsive core-shell nanoparticles with cross-linked π-conjugate core based on amphiphilic block copolymers by RAFT polymerization and palladium-catalyzed coupling reactions, Category: alcohols-buliding-blocks, the publication is Polymer (2014), 55(23), 6025-6035, database is CAplus.

Well-defined amphiphilic block copolymers composed of S-vinyl sulfides and N-iso-Pr acrylamide (NIPAM) were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization Thermoresponsive core-shell nanoparticles with crosslinked π-conjugate cores were obtained by in situ crosslinking reactions between 4-bromophenyl moieties in the block copolymers and diboronic acids or a diamine compound in the presence of a palladium catalyst following micelle formation in ethanol/H₂O or ethanol. We initially investigated RAFT polymerization of two S-vinyl sulfide derivatives, namely Ph vinyl sulfide (PVS) and 4-bromophenyl vinyl sulfide (BPVS), using a dithiocarbamate-type chain transfer agent (CTA). Then, RAFT polymerization of NIPAM using poly(S-vinyl sulfide) macro-CTAs was conducted to synthesize the amphiphilic block copolymers. Suzuki and Buchwald-Hartwig coupling reactions were found to be effective in the preparation of core-shell nanoparticles with thermoresponsive shells and crosslinked optoelectronic cores. The resulting nanoparticles showed characteristic thermoresponsive properties, as confirmed by turbidity and dynamic light scattering measurements. Stable and uniform core crosslinked nanoparticles were successfully prepared by the in situ palladium-catalyzed coupling reactions, and the optoelectronic and thermoresponsive properties of the nanoparticles could be tuned depending on the nature of the difunctional coupling agents, reaction conditions, and comonomer composition of the block copolymers.

Polymer published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, Category: alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Fernando, Roshan published the artcileRod-like oligomers incorporating 2,6-dialkylamino core-substituted naphthalene diimide as acceptors for organic photovoltaic, HPLC of Formula: 239075-02-6, the publication is Organic Electronics (2013), 14(6), 1683-1692, database is CAplus.

Core-substituted naphthalene diimides (core-substituted NDIs) were incorporated into rod-like mols. and oligomers through reaction at the imide nitrogen positions. N,N’-Di(4-bromophenyl)-2,6-di(N-alkylamino)-1,4,5,8-naphthalenetetracarboxydiimide was synthesized in only three steps, and used as a versatile platform to prepare extended structures by reaction with thiophene substrates using Suzuki-coupling conditions. The optoelectronic properties of the new compounds were examined by UV/vis absorption spectroscopy, fluorescence spectroscopy, cyclic voltammetry and theor. calculations The imide substituents had little effect on the optical and electrochem. properties of core-substituted NDIs in solution A bathochromic shift of the absorption was observed upon film formation, accompanied by quenching of fluorescence. These observations are consistent with increased inter-mol. interactions between core-substituted NDI moieties in the solid state. All compounds were tested in organic solar cells by blending with poly(3-hexylthiophene), and several showed a photovoltaic effect, demonstrating their potential as electron acceptors in organic solar cell. The best solar cell was observed for core-substituted NDI with 4-(thiophen-2-yl)phenyl imide substituents (5a), showing a power conversion efficiency of 0.57% and a large open circuit voltage of 0.87 V. This approach allows new structure-property relationship studies of non-fullerene acceptors in organic solar cells, where one can vary the imide substituent to optimize photovoltaic parameters while keeping the optical and electrochem. properties constant

Organic Electronics published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, HPLC of Formula: 239075-02-6.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Dave, H. N. published the artcileApplication of two advanced derivative spectrophotometric methods for simultaneous estimation of salbutamol sulphate, ambroxol hydrochloride and theophylline in pure and commercial formulations, Recommanded Product: trans-4-((2-Amino-3,5-dibromobenzyl)amino)cyclohexanol hydrochloride, the publication is International Journal of Current Pharmaceutical Research (2022), 14(3), 33-38, database is CAplus.

Two advanced spectrophotometric methods have been proposed for the simultaneous determination of Salbutamol sulfate, Ambroxol hydrochloride and Theophylline in pure and pharmaceutical formulations. The proposed methods exclude the hectic steps of time-consuming sample preparations or purification or separation steps. There is no any spectrophotometric method has been avail for simultaneous estimation of the ternary mixture containing Salbutamol sulfate, Ambroxol hydrochloride and Theophylline. The methods are derivative ratio spectra zero-crossing method and double divisor ratio spectra derivative method resp. Both the methods are found to be rapid, accurate, precise, reliable and economical as well. The developed methods show best results in terms of linearity, accuracy, precision, limit of detection and limit of quantification for standard laboratory mixtures of pure drugs and marketed formulations. The range for Salbutamol sulfate, Ambroxol hydrochloride and Theophyllineare found to be 1-35μg ml^-1, 5-35μg ml^-1 and 6-60μg ml^-1 resp. For the derivative ratio spectra zero-crossing method, the values of the limit of detection are found to be 0.3161μg ml-1, 0.2212μg ml^-1 and 0.2910μg ml^-1 and the values limit of quantification are found to be 0.9571μg ml^-1, 0.7412μg ml^-1 and 0.9671μg ml^-1 for Salbutamol sulfate, Ambroxol hydrochloride and Theophylline resp. For double divisor ratio spectra derivative method, limit of detection values is found to be 0.3251μg ml^-1, 0.2591μg ml^-1 and 0.2640μg ml^-1 and the limit of quantification values are found to be 0.9870μg ml^-1, 0.8650μg ml^-1 and 0.8812μg ml^-1 for Salbutamol sulfate, Ambroxol hydrochloride and Theophylline resp. The common excipients and additives did not interfere in the determinations of any of the drugs while being analyzed for com. formulations. These two spectrophotometric methods, which determine SS, AH, and THE simultaneously, are simple, specific, accurate, precise, rapidly, and economically, indicating that they can be used routinely in pharmaceutical anal. As a result, derivative spectrophotometry may be used effectively for the simultaneous determination of SS, AH and THE in the combined dosage forms without any prior separation of individual drugs.

International Journal of Current Pharmaceutical Research published new progress about 23828-92-4. 23828-92-4 belongs to alcohols-buliding-blocks, auxiliary class Membrane Transporter/Ion Channel,Sodium Channel, name is trans-4-((2-Amino-3,5-dibromobenzyl)amino)cyclohexanol hydrochloride, and the molecular formula is C13H19Br2ClN2O, Recommanded Product: trans-4-((2-Amino-3,5-dibromobenzyl)amino)cyclohexanol hydrochloride.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Shkodin, N. E. published the artcileTesting of anthelmintics during experimental and spontaneous nematodosis of sheep, Quality Control of 3818-50-6, the publication is Trudy Kirgizskogo Nauchno-Issledovatel’skogo Instituta Zhivotnovodstva i Veterinarii (1975), 20-1, database is CAplus.

Nephthamon (I) [3818-50-6] (0.5 g/kg) or copper sodium carbonatoarsenate [65722-74-9] (0.1 g/kg) given orally to sheep exptl. infested with lung nematodes daily for 6 days gave complete control of the parasites. I also gave 100% control in spontaneously infested sheep, whereas Cu Na carbonatoarsenate was about 95% effective.

Trudy Kirgizskogo Nauchno-Issledovatel’skogo Instituta Zhivotnovodstva i Veterinarii published new progress about 3818-50-6. 3818-50-6 belongs to alcohols-buliding-blocks, auxiliary class Anti-infection,Antiparasitic, name is N-Benzyl-N,N-dimethyl-2-phenoxyethanaminium 3-hydroxy-2-naphthoate, and the molecular formula is C12H16O3, Quality Control of 3818-50-6.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Rundel, Kira published the artcileNaphthalene diimide-based small molecule acceptors for organic solar cells, Recommanded Product: 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, the publication is Journal of Materials Chemistry A: Materials for Energy and Sustainability (2017), 5(24), 12266-12277, database is CAplus.

This work introduces six novel naphthalene diimide (NDI) mol. acceptors for evaluation in organic solar cells based on two different chem. architectures: a star-shaped structure with a triarylamine core flanked by three NDI moieties and a linear mol. composed of a bithiophene bridge between two NDI moieties. For each mol. structure, three different side chains are examined, with alkyl chains linked to the NDI core either through oxygen, sulfur, or nitrogen substituents. Both the chem. structure and the side-chain heteroatom substitution were found to influence the optoelectronic and photovoltaic properties of these mol. acceptors. Organic solar cells were fabricated with each acceptor, utilizing PBDTTT-EFT (also known as PTB7-Th) as the donor material in inverted bulk-heterojunction devices. Nitrogen was observed to lower the solar cell performance for these acceptors by significantly decreasing the short circuit c.d. (J_SC), while sulfur increased the J_SC and, in the star configuration, led to the highest power conversion efficiency (PCE) of 2.8% – which is amongst the highest for any mol. NDI-based acceptor to date. Grazing incidence wide-angle x-ray scattering (GIWAXS) measurements of the star-shaped materials showed the side-chain substitutional atom significantly alters the material’s packing configuration in neat films, with films blended with PBDTTT-EFT showing features characteristic of the neat donor and acceptor materials, indicating that the small mols. do not disrupt the packing of PBDTTT-EFT (and vice versa). Resonant soft x-ray scattering (R-SoXS) measurements indicate the PBDTTT-EFT:star-shaped acceptor blends are not subject to coarse phase-separation, with the average domain size for all three star-shaped acceptor blends typically being <100 nm. This is confirmed by similar topog. for blended films in AFM images amongst the three acceptors. Photoluminescence (PL) quenching measurements, however, found large differences in PL quenching efficiency which were attributed to differences in the driving force for charge transfer, with the nitrogen substituted compound showing the lowest PL quenching and the sulfur replacement showing the highest.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, Recommanded Product: 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts